Final answer:
Three environmental threats to human welfare are habitat loss, overharvesting, and the introduction of exotic species, exacerbated by human population growth and consumption. Climate change also poses a significant threat, affecting agriculture, public health, and social stability.
Step-by-step explanation:
Three examples of threats to humans from an environmental perspective include habitat loss, overharvesting, and the introduction of exotic species. These factors not only impact biodiversity, but also have significant implications for human welfare.
Habitat loss and overharvesting are primarily driven by increasing human population and their consumption patterns, while the introduction of exotic species is often facilitated by global mobility and trade.
Additionally, anthropogenic climate change is a developing threat that is caused by the human need for energy, often met through the burning of fossil fuels, further exacerbating issues like extreme weather events, rising sea levels, and warming ocean temperatures.
Beyond these direct environmental threats, humans also face indirect threats such as diseases, which have historically had profound impacts on human populations and continue to pose risks.
Notably, clean water and sanitation systems have been essential in mitigating some of these risks, but as new diseases emerge, collaboration among engineers, scientists, governments, and health workers will be crucial in addressing these challenges.