Scientists explain ancient Rome’s long-lasting concrete

Researchers have unlocked the chemistry of Roman concrete which has resisted the elements for thousands of years. Ancient sea walls built by the Romans used a concrete made from lime and volcanic ash to bind with rocks. Now scientists have discovered that elements within the volcanic material reacted with sea water to strengthen the construction. ...

Air quality: Challenge against government plan rejected

The High Court has rejected a legal challenge against the government’s plans to improve air quality. Campaign group ClientEarth had brought the case, saying draft measures on cutting nitrogen dioxide levels were flawed and “plainly unlawful”. The court ruled last year that government plans to meet air quality limits were inadequate. But a judge refused the ...