If you're looking for hints to today's Connections puzzle, here are categories, hints and answers to puzzle #753 on July 3.

Effectively balancing carbon efficiency and carbon equity is vital for China’s carbon peaking and carbon neutrality goals; however, the relationship between them remains unclear. This study first ...

Photosensitive organic molecules and semiconducting minerals have been widely reported to produce hydroxyl radicals (•OH) in aquatic environments. However, studies employing multicomponent systems ...