It is high time we should enhance the awareness of people that environmental protection is vital tous .请问

It is high time we should enhance the awareness of people that environmental protection is vital tous .请问
It is high time we should enhance the awareness of people that environmental protection is vital to
us .请问

It is high time we should enhance the awareness of people that environmental protection is vital tous .请问
不对.
It is high time we should make people more aware of the fact that environmental protection is vital to us.
最好是：
It is high time we raised the level of people's awareness of the importance of the environmental protection
It is high time we raised people's awareness of the importance of the environmental protection