You can visit Wikipedia for information regarding water pollution..
Correlation between latitude and temperature
Latitude is one factor that affects California's different climates. The higher the latitude the lower the temperatures. temperature changes happen more slowly in oceans than on land in the same amount of time.
An increase in atmospheric greenhouse gases are likely to cause many different things. Here are a few examples:
- Greenhouse gases (such as carbon dioxide, methane..) will cause the earth to get hotter. A hotter earth basically means global warming.
- The increased temperature will cause the polar ice caps to melt, which in turn increases sea levels (making some low-lying areas prone to flooding) and destroys habitats for many species (polar bears, for example).
- Extreme weather will become more commonplace, droughts will occur more often.
There are many more things that I can include but if I were you I'd go check out BBC Bitesize, it's a website that includes lots of different subjects including Geography. I'm not sure if you're in the UK but even if you aren't it will be worth to give it a look. Hope this helps!