To claim 'The purpose of life is easy. It's to live', is an obvious and fundamental condition of all life, including the most primitive bacteria, and all animals and plants.
What distinguishes humans from all those other forms of life, is that we can articulate such ideas and observe that there is a common fundamental characteristic that all living creatures and plants share, which is an inbuilt or instinctual drive to reproduce. That's how we distinguish between animate and inanimate.
However, within that fundamental purpose of living, and keeping ourselves alive by eating when we are hungry, there are lots of additional purposes, such as feeding our ego and sense of vanity by gaining great wealth and power over others, or helping others through a sense of compassion, or using our talents to increase the scientific understanding of the world in which we live, in order to provide the opportunity for greater control over our environment and circumstances, and greater security, and so on.
I sympathise with the environmentalists concern about pollution in any form, and I have no objection to research and investment in sustainable and alternative sources of energy. I'm very impressed with the potential of solar power, and I would rejoice if scientists were to succeed in developing an inexpensive, durable, lightweight and efficient type of battery which did not rely upon relatively rare elements such as Lithium which would become scarcer and more expensive if the production of electric cars were to take off.
My only objection is the misrepresentation of CO2 as both a pollutant and a major driving force of climate change.