What are the consequences of humans adding gases and other substances to earth's atmosphere?

What would happen if the krill were removed from the food web

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.