There are various speculations regarding the next World War, i.e., World War 3. Many world leaders, often mention that we are in a grave situation already, and a few mistakes away from triggering a world war. It is usually debated that the next world war will be fought using deadly forces like atomic weapons, chemical weapons, and biological weapons.

There are more than twelve thousand nuclear weapons across the world now. Just two atomic bombs in Hiroshima and Nagasaki in Japan during the Second World War brought a nuclear winter after destroying millions of lives. Even if just 100 current-day atomic weapons were used in the Third World War, it would be a catastrophe for the environment, causing irreversible changes to our climate. An increase in temperature, atomic dust and subsequent high radiation clouds spreading miles and miles will make our atmosphere impenetrable to sunlight. This might usher in another ice age, causing an extinction-level climate change.

Similarly, using deadly chemicals may pollute our rivers, destroying aquatic flora and fauna. Such acts will bring ecological imbalance and eventually will cause major climate change.

Biological weapons, similarly can be harmful not only to humans but also other species. Such warfare will also destroy ecosystem homeostasis. The next world war will be bad for the climate.