Which statement is not true of greenhouse gases?

The statement that is not true of greenhouse gases is :

 They are produced solely by human activities

Human activities such as: using hairspray, creating pollution, etc are worsened the condition of the greenhouse effect, it exists even before we did those things.

Explanation:

Emissions of gases by humans began to rise dramatically because of the economic Revolution and changes in land use. Several greenhouse gas emitting activities area unit currently essential to the worldwide economy and a elementary a part of trendy life.

Carbon dioxide from the burning of fossil fuels is that the largest single supply of gas emissions from human activities.

Though humans are the main cause of greenhouse effect.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.