76. Everyone is becoming / has become aware (of the fact) that the environment is a serious issue 

77. However, we do not do / have not done much to deal with the / this problem because we seem to wait for the government to take actions 

78. In my opinion, individuals can do many / a lot of things to help solve the problem 

79. To begin with, we can be (more) responsible in the way we dispose of waste 

 
80. We should not throw rubbish into lakes and rivers 

76.everyone / become / aware / environment / be / serious issue

==>Everyone is becoming aware that environment is a serious issue.

78.in / opinion,/ individuals / can / do / things / help / solve / problem

=>In my opinion,individuals people can do many things to help with solving this problem.

79. begin with,/ we/ can / responsible / way / we / dispose / waste

==>To begin with,we can have responsible way that we can dispose waste.

90.we / not / throw / rubbish / lakes / rivers

==>We shouldn't throw rubbish into lakes and rivers.

77However, we have not done  much to deal with this problem because we seem to wait for governments to )take actions