pick from the following.
[1]. coal.
[2]. natural.
[3]. Pesticides.
[4]. flooding.
[5]. cigarettes.
[6]. Smoking.
[7]. Cars.
[8]. burning.
Q: Fact 1: Erosion of soil has a negative impact on the environment. Fact 2: Soil Erosion Soil erosion is a natural process. Given the two facts above, what kind of process can have a negative impact on an environment?
A:
[2].