Long-term exposure to high levels of air pollution can make people more susceptible to COVID-19.
Locals venturing outdoors in New Delhi "felt an itching or burning sensation in the eyes and throat," a newspaper reported.
"This is potentially a very valid problem that shouldn't be overlooked," says one scientist.
Banned and disused chemicals from an industrial past continue to poison wildlife in rivers throughout the United Kingdom.
Plastic waste has reached catastrophic proportions in the oceans and it is increasing further still.
Artists are required to place hunting elements in their Duck Stamp contest entries, but some say that art now showcases pollution.