First of all, this depends on the type of concrete used. If the concrete is permeable or pervious, then it allows water to soak through to the earth below – thus enabling trees and plants to access the moisture. Secondly, if the concrete has been made from recycled materials such as rubble then that’s another factor to consider in how environmentally friendly it is.
Lastly, there’s the fact that concrete is so long-lasting. Because it needs so little upkeep, this actually ensures maintenance is kept to a minimum – meaning once it’s down it rarely needs anything done to it. Therefore, the production and manufacture side of concrete has a lower impact on our environment in comparison to other building materials.