All other points are subjected to the long history of the world that is adaptation. Insects? Hurricanes? Nothing new. Desalinization should be a major undertaking and will become cost-effective like any and all other solutions the world has ever undertaken. Good lord - the first computer that filled a room and could only perform simple arithmetic cost more than 20 average people's annual incomes at the time. Pretty sure clean water for the world is feasible. Or, we can just worry about droughts and let half the world starve. Pretty sure I understand the difference between salt water and fresh water. Are you 14 or do you think you are talking to a 14 year old? Because you seem bright enough to realize that I understand way more than the average idiot.