Помогите составить предложения.
1. Oceans / one / the / of / the / is / most / problems / important / pollution.
2. Sea / many / die / birds / of / because / water / the / polluted.
3. Production / modern / nature / industry / to / threat / is / main / the.
4. The / if / is / forecast / weather / for / at / rain / stay / home / heavy.
5. Effect / the / explained / is / global / warming / also / by / greenhouse.