1 Subjects: “...blue economy...”

2 Subjects: “...blue intensity...”

3 Subjects: “...Deep-Blue...”

4 Subjects: “...blue-green algae...”

5 Subjects: “...blue...”

6 Subjects: “...blue jets...”

7 Subjects: “...blue-throated macaw...”

8 Subjects: “...red/blue ratio...”

9 “... and contributed to a reduction in carbon dioxide emissions, such as high-efficiency photovoltaic cells, blue light...”