Where would we be if we did not have air, water, soil and the sun? Even without one of these essential ecosystem elements, our survival on Earth would be dismal. ,
Invasive, alien species are bad for ecosystems. They reduce bidoversity and disrupt food chains, including our own.
In late summer last year my doctor prescribed a monthlong course of antibiotics for an infection. Medicines like antibiotics are great at wiping out bacterial infections.