Nuclear is just another dead end that requires constant, highly toxic mining - most often in distant countries.

Continuing professional development and registration is required in most countries.

Tests of manhood, once an important part of the growing-up process, are no longer required in most Western countries.

It is the very sort of varnish required in certain tropical countries, notably in Central America.

Pharmaceutical companies are required by law in most countries to perform clinical trials, testing new drugs on people before they are made generally available.

In addition, the administration of tied aid requires larger bureaucracies in both the donor and recipient countries.

This step will require zoning and the adoption of more efficient agricultural practices, especially in developing countries.

The lights are required in Canada and in several European countries.

There is a great deal to do, and it will require substantial funding from our programmes in developing countries.

A further 8 million people require food in neighbouring countries such as Kenya and Ethiopia.