do you believe humans are responsible for global warning or do you believe this is part of a natural cycle of earth like periodic ice age?

Both people and earth's natural phenomena are the one who are responsible for global warming. People abuse the nature; they burn many things, the smoke from vehicles and factories or other air pollutions can cause Global warming through Greenhouse effect. This disaster is also a phenomena and it's effect of Earth rotation around the sub.

bal is blood alcohol level. bac will normally be higher in a person with more body fat. so the answer to your question would be, as body fat decreases, the increasing rate of bal decreases.