They work in partially harsh conditions because they are outside mostly and it could be snowing or it could be very hot. They work outside and inside to test the environment and to work on computers to make it better inside.They hey work in a lab inside to test environmental stuff.
Yes, because we need the environment to stay safe and people to keep it safe from bad things that could destroy it. Also we need the environment to live ,say without trees we would not have oxygen or paper.
They can not goof off while doing work and also they have to take care of the environment to keep it safe from pollution.
They perform environmental work to make the world better
They make everything better in our lives so they will probably make a lot of things better than they already are.