25 small icons (32*32px) which shall ivisualize fields of politics/public life

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This customer received 30 graphic designs from 12 designers. They chose this graphic design from Futuristic_Design as the winning design.
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Graphic Design Brief
The icons are needed to visualize pictographically topics of political or public life or fields in politics, so that when someone sees the icon for financial system she/he knows the text will be about financial things, banks, taxes etc.
Here there shall only be designed a few. The winner should then design all the 25 in the 7 days after winning in the same style as she/he did here. You can also tell me beforehand if you need more money for the whole 25. It's not even necessary to design them new. If someone knows icons in a library and she/he can give me all the necessary rights to use them in the internet, this could also be ok.
In the end I need icons for the following 23 topics (+ perhaps 2 more):
1. Economy
2. Ecology
3. Climate
4. Democracy
5.Europe
6.Germany
7. Justice / justice system
8. Public participation/Civic participation
9. Lobbying
10. Financial System
11. Tax
12.Health
13.Education
14. Living/Housing
15. Nature/Wildlife conservation / Environment protection
16. Social Policy / Welfare Policy / Social Justice
17. Power Generation
18. Traffic (Public Transport, Bicycles, cars, ships, airplanes)
19. Digital Politics / Internet politics
20. Agriculture
21. Foreign aid/Development aid
22. Refugees/Migration
23. Others
In the attachment I put some not so nice icons, so that you can get an impression, 1 for wildlife conservation, 1 for traffic. They are in format 32*42, but the real part is 32*32.
Target Market(s)
The text will be read by people who are interested in politics. So they may be old, young, even very young (Fridays for Future etc.), women and men. All kinds of political directions, right, left, liberal, green, conservatives, anarchists etc.etc.. The topic is mostly serious, not happy, It's in Germany,
Industry/Entity Type
Politics ans NGOs
Font styles to use
Colors
Colors selected by the customer to be used in the logo design:
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- The icons shall have the same style. It's okay, if they have different colors, eg green for ecology-topics, blue for econimcal objects, gray for politics,
Nice to have
- The icons should be serious, but it would be nice if they somehow look friendly.
Should not have
- It shouldn't be funny. It shouldn't deter anyone. It shouldn't be nerdy.