1)
Helicopters are very convenient for dropping freight by parachute,but this system has its problems.Somehow the landing impact has to be cushioned to give a foft landing.The movement to be absorbed depends on the weight and the speed systems bounce the load as it lands,sometimes turning it over.To avoid this,Bertin,developer of aerotrain,has come up with an air-cushion system which assures a safe and soft landing.
2)
Everyone agrees that water pollution is a serious problem today.Oceans,lakes,and rivers all over the word are becoming polluted with garbage and dangerous chemicals,Factories contribute to the problem because they rely on the rivers for disposing of wastes.Oil and other chemicals can kill fish and people make water bad for drinking.Polluted water is hazard to everyone.Since people are dependent on water,they should be involved in finding a solution to this problem.
3)
The threat of impending financial disaster concentrates political minds wonderfully. On Thursday a group of Congressional leaders heard Hank Paulson, the Treasury secretary, and Ben Bernanke, the Federal Reserve chairman, paint a dire economic scenario if they did not approve a more sweeping remedy for the financial crisis. Student and car loans, not just mortgages, would all be harder to get. The economy would sink into a severe recession.
For this reason, ad hoc responses will still be critical, such last week’s federal guarantees for money-market funds, Fed loans to banks to purchase asset-backed commercial paper and, on Sunday, approval of the remaining two big independent investment banks, Morgan Stanley and Goldman Sachs, to become Fed-regulated bank holding companies whose investment bank units can now borrow from the Fed on the same terms as other banks.
It could be some time before the Treasury is able to purchase mortgages en masse, and longer still before that starts to affect the broader financial system and economy. In the meantime, the crisis could claim other victims.