North Korea's bellicose nuclear rhetoric has put sharply into the focus how some states are able to put world peace and security at risk and, as a result of their recent actions, this issue has moved to the top of the international agenda.

North Korean Dictator Kim Jong-Un is behaving rationally. The 30-year-old is new leader of a gang which has taken over - nay, created - an entire country, and like any boss he wants to keep his gang in power and build its wealth and status.

My job as energy and climate change secretary is to both power the country and protect the planet. Nuclear power delivers on both of these objectives. I'm determined to use all of my powers to make sure that Britain leads the way in sourcing the energy we need from low carbon sources.

Those of us who support disarmament long for a day when politicians end the perpetual arms race and focus on issues closer to home. Trident itself is part of a political mindset that says Britain should be playing an aggressive and interventionist role abroad.

With the huge benefits of investing in renewables, energy efficiency and demand reduction becoming ever more obvious, it's clear that there needs to be far greater scrutiny of the policy decisions that are propelling Britain towards a nuclear future.

Nuclear weapons may be filthy, but they are a comparatively clean way of deterring people from using biological and chemical weapons which are worse.

The reported comments by MI6 chief Sir John Sawyers that Iran would likely achieve nuclear weapons by 2014 only confirm what was indisputable to anyone who has looked at the evidence. Iran wants nuclear weapons and is fast developing the capacity to construct them.

The word "nuclear" is often on the front pages of the press, whether you're in Tehran, Tokyo or Tunis. In the last few weeks alone, we've seen international talks about Iran's nuclear programme and united international concern that it is developing a nuclear weapon.

From the point of view of nuclear deterrence this was ideal. A president who could be counted upon to order a nuclear strike, or one who could be counted on to refrain from ordering one, could be out manoeuvred. A president who was apparently irrational could not be.

The Government is to publish a review of the UK nuclear industry in the light of the Fukushima disaster, amid concerns it has pushed ahead with new re...

Our ageing power plants are shutting down. In less than a decade, a quarter of them will go offline. We must build the equivalent of twenty large power stations by 2020 if we are to assure supply and meet our binding renewables and carbon targets