THE easiest remedial action against global warming is an agreement to limit or vastly reduce the population explosion.

Net result: less need for increased farming and housing so no depletion of rain forests (or endangering natural animal species), less need for combustion materials for power or heat, less need for transport on land or sea or air, and saving the necessity of producing more and more products that create pollution.

It is the population explosion that depletes the natural environment and harms progress. Alternative planets? Do you want the War of the Worlds now?

Gordon Ross, Dodsworth Avenue, York.