If new good filters are not used at plants - rivers and lakes will be poisoned., If countries test nuclear weapons - a lot of people will die., We'll save the Earth - if we can solve the ecological problems., People will be healthier - if the air pollution is stopped., If people want to survive - they must solve the environmental ploblems quickly., If nuclear power stations go wrong - they will cause nuclear pollution., If people stay in direct sunlight for a long time - they will get ultraviolet radiation from the sun., If there is no ozone layer in the atmosphere - we won't be protected from the ultraviolet radiation, A lot of animals will become extinct - if we don't save them., If government helps young families - the population will grow.,

Tabla de clasificación

Estilo visual

Opciones

Cambiar plantilla

¿Restaurar actividad almacenada automáticamente: ?