Name and briefly explain three main disadvantages for the use of fossil fuels. you can approach this question from a perspective of resource availability, occupational hazards, public health, etc. what is pm2.5? why does it cause more harm than larger particulate matters? more than half a century ago, the london fog claimed tens of thousands of lives. recently, developing countries like china and india are also experiencing heavy air pollution. list and briefly explain the similarities both in causes of the pollution and the underlying reasons for that cause. there are many pollutants associated with the combustion of fossil fuels. name three and explain what health effects they could have. climate change could have profound health impacts to our society. give one example and describe the causal chain from climate change to the corresponding health impact.