How many people in the United states depend on groundwater

One does not belong why? ice, gold ,wood ,diamond and table salt

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.