user: What can be done to resolve issues with climate change

assistant: Climate change is dangerous as it alters the climate very rapidly leading to shift in seasons and damaging the habitats of wild life for example. Some ways to control it could be: 
1. Reduce air pollution - move towards electric vehicles. Also move towards renewable source of energy so that increased demand can be met.
2. Control ozone depletion - Ban use of chemicals that encourage ozone hole depletion as this leads to melting of polar ice caps.
3. Plant more trees - They help in regulating the environment.

user: What is a clique in graph theory?

assistant: In graph theory, a clique is a subset of vertices of an undirected graph such that every two distinct vertices in the clique are adjacent.

user: What causes a spinning top to stop?

assistant: Friction.  If using a frictionless environment, a top could spin indefinitely