I disagree. The 70s may have been a tough time for some but it was mostly a time of renewal and new things coming. The first Earth Day was celebrated in 1970, so it was a start of awareness of what was happening to our planet. Also, the 70s are mainly known as the time of the hippie movement. people were upset about things happening but they also tried to change things. People were mostly happy and enjoying life. Like someone about that time (I can't remember who) "I was alive and living".
Hope that helps!