Answer:
the evidence points to increase of carbon dioxide in the atmosphere. There are many reasons, but you could probably go with deforestation, unregulated emissions--burning fossil fuels, industry and transportation.
Answer:
non metals can't accept electrons, that's why they share electrons through covalent bonds
Answer: C
Explanation: Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs are known as subduction zones.
The answer would be gas I believe