https://padlet.com/elpapi1505/cqmj9lpyd4bb Hecho pensando en el precio en-us 2018-09-20 12:09:25 UTC 2025-02-21 03:27:21 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Terminator.png elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283846749 Pollution is the introduction of contaminants into the natural environment that cause adverse change.]]> 2018-09-20 12:11:21 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283846749 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283848478 2018-09-20 12:15:02 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283848478 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283849232 2018-09-20 12:16:44 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283849232 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283849876 Air pollution has always accompanied civilizations. Pollution started from prehistoric times, when man created the first fires. According to a 1983 article in the journal Science, "soot" found on ceilings of prehistoric caves provides ample evidence of the high levels of pollution that was associated with inadequate ventilation of open fires.]]> 2018-09-20 12:18:12 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283849876 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283851134 2018-09-20 12:20:54 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283851134 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283852036 2018-09-20 12:22:40 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283852036 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283852957 Industrialized countries have worked to reduce levels of sulfur dioxide, smog, and smoke in order to improve people's health. But a result, not predicted until recently, is that the lower sulfur dioxide levels may actually make global warming worse.]]> 2018-09-20 12:24:24 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283852957 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283853085 Industrialized countries have worked to reduce levels of sulfur dioxide, smog, and smoke in order to improve people's health. But a result, not predicted until recently, is that the lower sulfur dioxide levels may actually make global warming worse.]]> 2018-09-20 12:24:38 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283853085 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283854023 Another pollutant associated with climate change is sulfur dioxide, a component of smog. Sulfur dioxide and closely related chemicals are known primarily as a cause of acid rain. But they also reflect light when released in the atmosphere, which keeps sunlight out and causes Earth to cool. ]]> 2018-09-20 12:26:28 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283854023 elpapi1505 https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283855424 2018-09-20 12:29:02 UTC https://padlet.com/elpapi1505/cqmj9lpyd4bb/wish/283855424