Green plants and algae produce oxygen so the levels increased. as oxygen built up more complex life like animals could evolve.
200 million years ago reaches 80% nitrogen, 20% oxygen and small amounts of other gases ( less than 1%) water vapour , noble gases, carbon dioxide.
Particles absorb frequencies of radiation. GG gases don't absorb the incoming radiation from the sun, they absorb the long wavelength radiation from the earth, re-radiate it back in all directions. this thermal radiation heats the surface off the earth and is called global warming.
deforestation,FF,agriculture, creating waste like landfill
effects- polar ice caps melt so sea levels rise so more floods and costal erosion, change in rainfall patterns affect a regions ability to produce food, freuency/severity of storms increase, amount of water available to habitats affect their distribution.
carbon footprint is the amount of carbon dioxide and other GG emmited over somethings lifetime.
reducing carbon footprints- renewable energy sources,efficient processes cut waste that decomposes and releases methane, gov tax companies/people on amount of carbon dioxide used.
companies dont want to affect their economic growth. not lots of education about why we need to change.
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