'You gotta die of sumtin'.... why do you need mask for?

surgical masks only keep out particulates, bacteria etc. If you want to keep out smog you will need a mask containing activated charcoal. Like a gas mask or a mask used by a paint shop which contains activated charcoal. Maybe China has face masks like surgical masks that contain charcoal. Check and see.

I think this has already been answered.

Into the ether and be gone

In the USA

A shop

NASA should start selling space suits and water filters etc here. It could finance the next Mars mission.

Stay home and: 

http://in5d.com/top-10-air-purifying-plants-to-improve-the-feng-shui-of-...

1. Areca Palm

Scientific Name:  Chrysalidocarpus Lutescens
Removes: All tested indoor air toxins.
Benefits:
* Very popular and easy to care for plant.
* Leaves have a gracious flow that will soften the energy of any home or office space.

2. Lady Palm

Scientific Name: Rhapis Excelsa
Removes: * Most indoor pollutants.
Benefits: 

• One of the best plants to improve the indoor air quality.
• Very popular and easy to care for.

3. Bamboo Palm

Scientific Name: Chamaedorea Seifrizii
Removes: Benzene, Trichloroethylene, Formaldehyde.
Benefits:

• Adds a peaceful, tropical feeling to any environment.
• Most resistant to insect infestation.

4. Rubber Plant

Scientific Name: Ficus Robusta
Removes: Most pollutants, especially formaldehyde.
Benefits:
* Will survive in dim light and tolerate cool temperatures.
* Excellent ability to remove toxins from any indoor environment.

5. Dracaena Janet Craig

Scientific Name: Dracaena Deremensis Janet Craig
Removes:  Most pollutants, especially trichloroethylene.
Benefits:

• Attractive plant, easy to grow in very little light.
• Best in Dracaenas family for removing home or office chemical toxins.

6. English Ivy

Scientific Name: Hedera Helix
Removes: Most pollutants, especially formaldehyde.
Benefits:

• Another hardy, very popular plant, often used in public spaces.
• Easy to grow, very adaptable, except for high temperatures.

7. Dwarf Date Palm

Scientific Name: Phoenix Roebelenii
Removes: Most pollutants, especially xylene.
Benefits:

• A slow grower that can reach a height of about 5 to 6 feet.
• Can tolerate low levels of light.

8. Ficus Alii

Scientific Name: Ficus Macleilandii “Alii”
Removes: Most pollutants, especially formaldehyde.
Benefits:

• Easier to care for than the Ficus Benjamina, can loose some leaves while adjusting to a new space.
• There are 3 types of Ficus Alii: the standard tree, the bush and the braids (several entwined trunks.)

9. Boston Fern

Scientific Name: Nephrolepis Exaltata “Bostoniensis”
Removes: Most pollutants, especially formaldehyde.
Benefits:

• Beautiful and lush, a favorite for any home or office.
• It does require attention in order to thrive.

10. Peace Lily

Scientific Name: Spathiphyllum sp.
Removes: Alcohols and acetone, Trichloroethylene, Benzene and Formaldehyde.
Benefits:

• Beautiful plant with gentle white flowers, easy to care for.
• Strong and peaceful energy.

Same plants, but nicer plant's pics:

http://fengshui.about.com/od/fengshuicures/ss/Top-10-Feng-Shui-Air-Purif...