Last winter’s flu epidemic was short and mild. And then COVID-19 arrived. The flu epidemic in the winter of 2019/2020 was mild and lasted only 5 weeks.
EC-definition of nanomaterial provides proper basis In recent years, an increasing number of applications and products containing or using nanomaterials have become available.
Preserving ozone treaty benefits to climate change The Montreal Protocol has not only served to protect the ozone layer, it also has provided a certain degree of climate protection.