Question

question 46
1 pts
greenhouse gases
decreased due to human activities.
have not changed as a result of human activities.
were not present before human activities.
increased due to human activities.

Explanation:

Human activities like burning fossil fuels (coal, oil, gas) for energy, deforestation (which reduces the number of trees that can absorb carbon dioxide - a major greenhouse gas), and industrial processes have led to an increase in greenhouse gases in the atmosphere. Greenhouse gases were present before human activities (e.g., carbon dioxide is part of the natural carbon cycle), but their levels have risen due to human actions. And it's clear that human activities have affected greenhouse gas levels (so they haven't remained the same or decreased).

Answer:

increased due to human activities.