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![Hide details for 2004](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/collapse.gif) | 2004 |
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![Show details for Septiembre](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Septiembre |
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![Show details for Agosto](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Agosto |
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![Show details for Julio](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Julio |
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![Show details for Junio](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Junio |
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![Show details for Mayo](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Mayo |
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![Hide details for Abril](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/collapse.gif) | Abril |
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| | 04/29/2004 | EPA lanzará Campaña 2004 en contra del asma y debutará nuevo video | ![](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/ecblank.gif) |
| | 04/22/2004 | Administración Bush se compromete a aumentar los humedales a nivel nacional | ![](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/ecblank.gif) |
| | 04/20/2004 | Administración Bush afirma su sólido compromiso a favor de las playas limpias | ![](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/ecblank.gif) |
| | 04/15/2004 | EPA emite designaciones referentes a los estándares de salud para el ozono | ![](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/ecblank.gif) |
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![Show details for Marzo](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Marzo |
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![Show details for Febrero](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Febrero |
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![Show details for Enero](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | Enero |
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![Show details for 2003](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | 2003 |
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![Show details for 2002](/peth04/20041031182305im_/http://yosemite.epa.gov/icons/expand.gif) | 2002 |
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