What are the threats to biodiversity?

Many human activities, which stem from the population explosion of the past few decades and how we live, threaten biodiversity. There are 6 billion humans on Earth today, and that number may reach 9 to 12 billion in the next 50 to 100 years. In addition, humans are using proportionally more energy, land, water, and natural resources (such as trees, fossil fuels, minerals, plants, and animals) than ever before