Globalization and modernization has resulted in Western consumer cultures spreading to countries like China and India, including meat-intensive diets which are supplanting traditional plant-based diets. More than 200 billion animals are consumed by a global population of over 7 billion annually, which philosopher and animal rights activist Steven Best argues is "completely unsustainable". A 2018 study published in "Science" states that meat consumption is set to increase by some 76% by 2050 as the result of human population growth and rising affluence, which will increase greenhouse gas emissions and further reduce biodiversity.