But e-bikes containing lithium-ion batteries are a newer challenge. "When a battery fails, it doesn't necessarily ignite, it will often produce some off-gases," says Stephen Welch, senior lecturer at the University of Edinburgh's Fire Research Centre. "Those off-gases are toxic and flammable. If they accumulate, you can have an explosion risk."
“脱贫的兜底必须是固若金汤的”
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弄虚作假要不得，形式主义要不得。“形式主义实质是主观主义、功利主义，根源是政绩观错位、责任心缺失，用轰轰烈烈的形式代替了扎扎实实的落实，用光鲜亮丽的外表掩盖了矛盾和问题。”
"These habitats are exceptionally rare, rich in biodiversity, support unique flora and fauna, and are impossible to recreate or replace," he said.