1. Historical Background: 

Scientists have been studying climate patterns for decades, examining data from ice cores, tree rings, corals, sediment layers etc. These records reveal that Earth's climate has experienced natural variations throughout history. However, since the Industrial Revolution, the planet has experienced changes that align with human activities. 

Industrial and agricultural processes release greenhouse gases – mainly CO2 and Methane - into the atmosphere which trap heat generating global warming. Increased GHG (Greenhouse Gases) concentrations directly relate to human activities, as evidenced by the significant rise in atmospheric CO2 levels since the Industrial Revolution (19th century). 

Scientists employ  computer models to simulate Earth's climate system. These models incorporate data on solar radiation and human-induced emissions. The models accurately reproduce observed temperature increases and other climate patterns. The simulations without human influence fail to replicate the observed changes, confirming the link between human activities and climate change.
Image (National Oceanic and Atmospheric Administration)

Multiple evidence are able to confirm that humans are responsible for climate change. Historical records, greenhouse gas emissions and climate models point to our significant impact on the Earth's climate system. Our role empowers us to take proactive steps to end with climate change and ensure a sustainable future for generations to come. 

This graph shows the temperature changes over a specific period of time. On the y-axis the degrees from -1 to 2 are represented, while the x-axis shows the years from year 1 to 2020, emphasizing the time period from 1850 to 2020, since the most notable activity occurs in that period. From the year 1 to the year 1850 there is a balance in the rise of temperatures, always staying around 0 and rising to a maximum of 0.5. From the year 1850 onwards, temperatures begin to rise drastically, exceeding values of 1 degree above previous periods in only 170 years, which is very worrying data. It can be concluded that this is the warmest period of the last 2000 years and probably also of the last 100000 years, also occurring in a tiny period of time with respect to these 2000 years. Temperatures have risen more in 170 years than in almost 2000 years. The worrying thing is that these temperatures do not seem to be going down and these are records that are of increasing concern to experts.

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