Q: Fact 1: Conserving resources has a positive impact on the environment. Fact 2: Recycling conserves natural resources. Given the two facts above, what does recycling do to the environment?

OPT:
1). prevent heat loss;
2). coal burning;
3). it has a positive impact on it;
4). reducing acid rain;
5). pollution;
6). greenhouse gases;
7). Something that makes plants green;
8). Enriches the soil;
A:
3).