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China advances sustainability from cities to seas and stars

China's push for zero‑waste cities under the 14th Five‑Year Plan has launched over 3,700 pilot projects and mobilized more than 1 trillion yuan (about $140 billion) for recycling and resource recovery. Beyond urban waste management, conservation efforts have paid off for black‑necked cranes, whose numbers on the Qinghai-Xizang Plateau have climbed steadily thanks to habitat protection. Further expanding its scientific reach, the AliCPT‑1 telescope at 5,250m altitude has begun capturing cosmic microwave background ripples, seeking clues to the Big Bang. Offshore, the Imaging Plankton Probe is uncovering the "invisible kingdom" of plankton with AI‑driven, in situ imaging, deepening understanding of marine ecosystems. Meanwhile, lab experiments have revealed that female moths detect ultrasonic distress calls from tomato plants to choose egg‑laying sites, opening new avenues for eco‑friendly pest control.