Il mio scaffale about humans and the environment by Giulia Colao

most of the world's supply of food is produced by growing crops or by keeping animals

flcorl63 — 2018-10-11 02:23:47 UTC

during the last century the quantity of food produced has greatly increased

flcorl63 — 2018-10-11 02:26:18 UTC

we must increase the food we produce because the world's increasing population needs to be fed

flcorl63 — 2018-10-11 02:36:04 UTC

with machinery such as tractors and combine harvesters one farmer can cultivate a much greater area of land in a much shorter time than using manual labour

flcorl63 — 2018-10-11 02:39:51 UTC

farmers are also using chemicals to improve the growth of their crops

flcorl63 — 2018-10-11 02:47:49 UTC

chemical fertilizers add more mineral ions to soils

black-footed ferrets are predators that feed almost entirely on burrowing rodents called prairie dogs

flcorl63 — 2019-02-09 05:01:50 UTC

farmers killed large number of prairie dogs because they thought they competed with their cattle for grass

in 1974 black-footed ferret was declared extinct in the wild, but in 1981 was discovered a small population of them in Wyoming

flcorl63 — 2019-02-09 05:03:54 UTC

the black-footed terrets were given protection

flcorl63 — 2019-02-09 05:11:20 UTC

some of the ferrets were taken to zoos, were they were given the right conditions to help them to breed

today the black-footed ferret is out of danger

flcorl63 — 2019-02-09 05:13:23 UTC

many of the offsprings were reintroduced into suitable habitats in several states, thus avoiding the extinction

flcorl63 — 2019-02-09 05:22:19 UTC

although these chemicals are expensive, the cost is outweighed by the increased quantity and quality of the crops

flcorl63 — 2019-02-09 05:23:40 UTC

INSECTICIDES are sprayed onto crops to kill insects pests that might reduce yelds or make the crop look less appealing to buyers; HERBICIDES are sprayed to kill weeds, which would compete with the crop plants and reduce their growth

selective breeding increase world food production

flcorl63 — 2019-02-09 05:29:59 UTC

it has produced crop plants that can grow in poor soils, or that are resistant to diseases, moreover modern wheat varieties produce far more grain per plant than older ones ever did

bah....

flcorl63 — 2019-02-09 05:33:06 UTC

negative impact of monocultures

flcorl63 — 2019-02-10 05:14:00 UTC

monoculture is when single variety of crop plants are grown in large area

flcorl63 — 2019-02-10 05:21:40 UTC

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flcorl63 — 2019-02-10 05:30:52 UTC

....e poi ci siete voi

flcorl63 — 2019-03-18 03:16:20 UTC

(e quello che ascoltate non è detto in una sola lingua)

flcorl63 — 2019-03-18 03:30:22 UTC

within the last 10000 years another organism had an enormous impact on the environment

flcorl63 — 2019-04-30 02:51:44 UTC

humans, through their activities, have been changing environment in a very significant way

all living things affects the living and non-living things around them

flcorl63 — 2019-05-10 04:20:40 UTC

rabbit fleas carry the virus which cause myxomatosis

flcorl63 — 2019-05-10 04:26:22 UTC

so they can affect the size of a rabbit population, but also the size of the fox population if the foxes depend on rabbits for food

the biggest event of living organisms on the environment happened 1500 million years ago

flcorl63 — 2019-05-10 04:30:36 UTC

at this time, the first living cells tha could photosynthesise evolved, so began oxygen production which gradually accumulated in the atmosphere

the appearance of oxygen in the air meant that many anaerobic organisms could now only live in particular parts of the earth which were oxygen-free

flcorl63 — 2019-05-12 06:29:30 UTC

such as deep layers of mud

it meant that many other kins of organisms, which used oxygen for respiration, could evolve

flcorl63 — 2019-05-12 06:40:47 UTC

habitats are destroyed when we use land for other purposes

flcorl63 — 2019-05-12 06:50:48 UTC

for growing crops, farming livestock, building roads, houses and factories, or for extraction of minerals and fuels, or for the adding of pollutans to land and water

moreover

flcorl63 — 2019-05-12 06:56:21 UTC

loss of biodiversity

the cutting down of large numbers of trees is called

flcorl63 — 2019-05-12 06:59:03 UTC

why deforestation happens?

flcorl63 — 2019-05-12 07:03:33 UTC

most concerns about deforestation has been about the loss of tropical rainforests

flcorl63 — 2019-05-12 07:05:45 UTC

flcorl63 — 2019-05-12 07:09:04 UTC

when an area of rainforest is cut down, the soil under the trees is exposed to the rain, so happens soil erosion and this make very difficult to the rainforest to grow back again

flcorl63 — 2019-05-12 07:12:45 UTC

moreover, the soil can also be washed into rivers, causing flooding for their silting

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THE GLASS AROUND THE GREENHOUSE BEHAVES LIKE THE CARBON DIOXIDE IN THE ATMOSPHERE

gases contributing the greenhouse effect

flcorl63 — 2019-05-12 07:37:03 UTC

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how the greenhouse gases concentrations in the atmosphere have changed since 1750

flcorl63 — 2019-05-12 07:40:28 UTC

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why we must be worried about the enhanced greenhouse effect

flcorl63 — 2019-05-12 07:51:12 UTC

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acid rain...

flcorl63 — 2019-05-12 07:56:30 UTC

to be continued

nuclear fall-out

flcorl63 — 2019-05-12 07:56:56 UTC

exposure to large amounts of radiation from these substances can cause radiation sickness and burns, but also mutation rates in DNA in our cells, which may lead to cancer

flcorl63 — 2019-05-12 08:06:11 UTC

ionising radiations can increase mutation rates in DNA

flcorl63 — 2019-05-12 08:11:22 UTC

because they damages the DNA molecules in living cells

flcorl63 — 2019-05-12 08:13:20 UTC

the least ionising is the gamma, but it is the most penetrating, the contrary is for for alpha radiation

flcorl63 — 2019-05-14 03:21:17 UTC

eutrophication

flcorl63 — 2019-05-14 03:21:30 UTC

to be continued....

pesticides

flcorl63 — 2019-05-14 03:22:14 UTC

flcorl63 — 2019-05-14 03:25:46 UTC

flcorl63 — 2019-05-14 03:26:10 UTC

how many types of fungicides

flcorl63 — 2019-05-15 02:21:18 UTC

...but also rodenticides

flcorl63 — 2019-05-15 02:24:50 UTC

flcorl63 — 2019-05-15 02:29:50 UTC

problems in monocolture pharming

flcorl63 — 2019-05-15 02:31:25 UTC

the population of insects or fungi may grow very rapidly because they have an inexhaustible food supply

pesticides are harmful substances

flcorl63 — 2019-05-15 02:38:42 UTC

if they are not used with care, some pesticides can do a lot of damage to the environment

DDT is a persistent insecticide

flcorl63 — 2019-05-15 02:44:03 UTC

it doesn't breaks down, but remains in the bodies of the insects or in the soil. any consumer eat the DDT too, and each time they eat an insect, more DDT accumulates in their tissues

DDT is non-specific

flcorl63 — 2019-05-15 02:50:53 UTC

this means that it is harmful to insects and other living things

in britain, DDT affected the breeding success of peregrine falcons

flcorl63 — 2019-05-15 02:54:48 UTC

so the peregrine falcon population dropped very quicly

flcorl63 — 2019-05-15 02:58:06 UTC

DDT make the egg shells very weak

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chemical waste

flcorl63 — 2019-05-15 03:06:56 UTC

may contain heavy metals: lead, mercury, cadmium...

heavy metals stop enzymes from working

flcorl63 — 2019-05-15 03:09:12 UTC

if they get into rivers, streams or the sea, they may kill almost every living thing in that area

non-biodegradable plastics

flcorl63 — 2019-05-15 03:11:38 UTC

female contraceptive hormones

flcorl63 — 2019-05-15 03:11:54 UTC

flcorl63 — 2019-05-15 03:32:58 UTC

conserving forests

flcorl63 — 2024-04-18 03:16:27 UTC

the practice of planting and maintaining forested areas for the benefit and sustainability of future generations

conserving fish stocks

flcorl63 — 2024-04-18 03:16:57 UTC

imposing strict limits on, or even suspending, catches of overfished species, and prohibiting catches of juvenile fish

endangered species

flcorl63 — 2024-04-18 03:17:28 UTC

maintaining genetic diversity

flcorl63 — 2024-04-18 03:17:54 UTC

reasons for conservation programmes

flcorl63 — 2024-04-18 03:18:17 UTC