Radical and irreversible changes to our environment pose the most serious risk to humanity with impacts on nearly every aspect of our lives. Climate change is disruptive because our planet functions best when it is neither too hot nor too cold. There is, for example. a relationship between average daily temperatures and crop yields, farmers’ incomes and general economic activity.
Climate change disruption is occurring on a planetary scale and more rapidly than at any other time in geological history. The significance of sea level rises, ocean warming, melting ice caps among other major global events is not yet clearly understood but the droughts, uncontrollable fires and extreme weather show that the disruptive effects are clear. There are fears that if certain critical thresholds are crossed in terms of our impact on the biosphere the changes could be irreversible and lead to the extinction of humankind.