Although many processes are involved, clearly combustion of fossil fuels is the most important factor driving the global increase in atmospheric and thus global warming.

Temperature

Explanation:

Lots of CO2 is released from the combustion of fossil fuels and as CO2 is a greenhouse gas it is able to trap the solar radiation in the atmosphere which results in the increase in the atmospheric temperature and causing global warming.

Due to this global warming, the glaciers are melting very fast which is increasing the water level of oceans that can results in the tsunami.

The environment is changing fast due to global warming. This is affecting animals, plants, and humans too. Habitat of animals living in the polar areas affected severely due to the increase in global temperature.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."