Energy & Green Tech

How much energy do we really need?

Two fundamental goals of humanity are to eradicate poverty and reduce climate change, and it is critical that the world knows whether achieving these goals will involve trade-offs. New IIASA research for the first time provides ...

Computer Sciences

The quantum computer already exists, but is not all that powerful

You may be one of those waiting for the quantum computer, the arrival of which we have been told is imminent for several years. Already at this point, DTU Associate Professor Sven Karlsson begins to look a little strained, ...

Energy & Green Tech

How solid air can spur sustainable development

The green hydrogen economy is a sustainable alternative to fossil fuels. However, one of the challenges of constructing a global hydrogen economy is hydrogen transportation by sea. A new paper proposes solid air as a medium ...

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List of sovereign states

This is a list of sovereign states, containing 203 entries, giving an overview of states around the world with information on the status and recognition of their sovereignty. It is arranged alphabetically. It includes both states widely recognized to be de jure sovereign and states that claim de jure sovereignty and exercise de facto control over some territory, but which are not generally recognised.

Note: the status of some entries on this list is disputed. For information on the criteria used to determine the contents of this list, see the "criteria for inclusion" section below.

This text uses material from Wikipedia, licensed under CC BY-SA