1 It is estimated that within 100 years there (to be) no rainforests left if deforestation (to continue) at the same pace as today.
2 Saudi Arabia (to freeze) its oil production if other major producers (to do) so.
3 There (to be) no going back from the climate chaos if we (not to change) the system.
4 If your solar panels (to generate) more power than you need, your electricity company (to look) at what you’ve produced over a full year.
5 If overfishing (to continue), all seafood (to run out) in 2050.