Billion-dollar coffins? New technology could make oceans transparent and Aukus submarines vulnerable

Military history is littered with the corpses of apex predators. The Gatling gun, the battleship, the tank. All once possessed unassailable power – then were undermined, in some cases wiped out, by the march of new technology. “Speed and stealth and firepower,” the head of the Australian Submarine Agency, Jonathan Mead, told the Guardian two years ago of Australia’s forthcoming fleet of nuclear submarines. “The apex predator of the oceans.” But for how much longer? In the first quarter of the 21st century, nuclear submarines have proven a formidable force:…

‘There is only one player’: why China is becoming a world leader in green energy

China’s vital statistics Chinese power took on an old-fashioned hue in the past week with a huge military parade, a gathering of former allies Russia and North Korea, and President Xi Jinping’s defiant vow not to be intimidated by bullies. Soldiers march during a military parade marking the 80th anniversary of victory over Japan and the end of World War II, in Tiananmen Square in Beijing, China. Photograph: Lintao Zhang/Getty Images That display reminded many of the cold war, but it captured only a fraction of China’s far greater modern…

Taiwan referendum on reopening last nuclear plant fails

A referendum to push for the reopening of Taiwan’s last nuclear plant has failed to reach the legal threshold to be valid, though the president said the island could return to the technology in the future if safety standards improved. The plebiscite on Saturday, backed by the opposition, asked whether the Maanshan power plant should be reopened if it was “confirmed” there were no safety issues. The plant was closed in May as the government shifts to renewables and liquefied natural gas. The small Taiwan People’s party proposed the referendum…

Weather tracker: Typhoon Podul pounds southern Taiwan

Typhoon Podul crossed southern Taiwan on Wednesday with wind speeds of up to 110mph (177km/h), equivalent to a category 2 hurricane. Podul had developed a week earlier, near the Northern Mariana Islands, and tracked west across the Philippine Sea, achieving typhoon status on Tuesday before making landfall in south-east Taiwan the following day. Podul whipped up high waves along the east coast, where a man died after being swept away while fishing. As the storm travelled overland, it dumped large amounts of rain across the south of the island, with…

Maglev train researchers may have solved ‘tunnel boom’ shock waves

Researchers hope they may have solved the “tunnel boom” problem as they prepare to roll out China’s latest prototype magnetic levitation train. The newest version of the maglev train is capable of travelling at 600km/h (about 370mph). However, the train’s engineers have wrestled with the problem of the shock waves which occur as the train exits the mouth of a tunnel. When a high-speed train enters an enclosed space such as a tunnel, air in front is compressed, like in a piston. The resulting fluctuations in air pressure coalesce at…

Weather tracker: deadly floods devastate northern China

At least 70 people have died in northern China after another bout of torrential rain triggered flooding, the latest in a series of extreme rainfall events in recent months. Between 23 and 29 July, Beijing and its surrounding areas recorded an average of 166mm, equivalent to the monthly norm. The suburban district of Miyun received the highest amount of rainfall, with 543mm recorded, equivalent to the region’s annual average. The death toll included 31 people in a Miyun care home, 10 who were swept away in a minibus in Shangxi…

Chinese official makes rare admission of failings over deadly Beijing floods

A Beijing city official has issued a rare public acknowledgment of official failings in the authorities’ response to the severe flooding that hit China’s capital this week. Yu Weiguo, a Communist party secretary for Miyun, the northern district worst affected by this week’s extreme weather, said in a press conference on Thursday that there were “gaps” in the city’s readiness for the deadly floods. More than 40 people are confirmed to have died in the flooding that hit Miyun and Yanqing, another Beijing district, on Sunday and Monday. Nine are…

Countries failing to act on UN climate pledge to triple renewables, thinktank finds

Most global governments have failed to act on the 2023 UN pledge to triple the world’s renewable energy capacity by the end of the decade, according to climate analysts. The failure to act means that on current forecasts the world will fall far short of its clean energy goals, leading to a continued reliance on fossil fuels that is incompatible with the target of limiting global heating to below 1.5C. A report by the climate thinktank Ember found that only 22 countries, most within the EU, have increased their renewable…

China floods: more than 30 killed in Beijing and tens of thousands evacuated

More than 30 people have been killed by heavy rain and flooding in Beijing and a neighbouring region, state media have reported, as tens of thousands more were evacuated from China’s capital. State broadcaster CCTV said that as of midnight on Monday, 28 people had died in Beijing’s hard-hit Miyun district and two others in Yanqing district as of midnight. Both are outlying parts of the sprawling city, far from the downtown. On Monday a landslide in neighbouring Hebei province killed four people, with eight other still missing. Heavy rain…