The Earth is now, on average, 1.1°C warmer than when records began in 1880. Such warming is apparent in the ever decreasing Arctic sea ice, which could be ice-free in summer in as little as five years.
This dramatic change is largely due to the vast amounts of greenhouse gases generated by human activities such as manufacturing, agriculture and energy production. Under capitalism, only profit matters.
The super-rich and their politicians - while pretending to care about the environment, and holding annual climate conferences - continue business as usual.
At the time of writing, London's mayor has issued a "very high" air pollution alert, advising even the physically fit to take precautions!
Despite how serious the problem is, big business has little interest in an effective response to climate change and pollution, as it's just not profitable.
A socialist government would nationalise the big polluters, as well as transport and energy, and the top corporations, under democratic workers' control and management. Then we could invest in green technologies and infrastructure to finally deal with humanity's greatest challenge yet.