Question

why scientist have been warning that development are not sustainable

Answer 1

1. Scientists have estimated that at the rate of use of resources, these resources will not last for more than 50 years.
2. The development today is not sustainable development as we're consuming the non renewable resources at a rapid speed.
Therefore we should start using alternative sources of energy

Answer 2

Scientists have been warning that the present type and levels of development are not sustainable because the resources are being over exploited on the name of development. This has led to the depletion of several resources and has also harmed the nature. There

are many non renewable resources which are likely to exhaust after some years. These resources cannot get replenished. For example, coal and petroleum are non renewable

resources which may likely to be exhausted. Similarly, water, which was a renewable resource earlier is being over used and may become scarce in future. Thus, the present way of over utilizing resources is not sustainable. These resources should e used cautiously and judiciously.