I think the government should invest more in renewable energy sources to ensure a sustainable future.
A) In my estimation, the government should invest more in renewable energy sources to ensure a sustainable future.
B) I am positive the government should invest more in renewable energy sources to ensure a sustainable future.
C) I dispute that the government should invest more in renewable energy sources to ensure a sustainable future.
D) It is an established truth that the government should invest more in renewable energy sources to ensure a sustainable future.
