It has definitely effected the environment positively. Let me tell you how. The first advantage for the environment is that the factories were closed. As a result of it, air pollution is at the lowest level. Not only the factories but also the use of public transports and cars has minimalized.

Everybody is at home so people don’t use their cars (majority of them).
Another advantage is for the animals, hunters couldn’t go hunting and so there are more on the Earth.
Last but not the least I will mention the ozon layer. We don’t use our deodorants. So, the ozone layer is better.
I think the effects are very positive for the environment an I am kind of happy to see it.